SN75176B

@@ -0,0 +1,52 @@+# SN75176B++**Texas Instruments** · RS-485 / RS-422 transceiver · SOIC-8++A differential bus transceiver for RS-485 and RS-422 multipoint networks, in SOIC-8, the long-time standard part for the job. It pairs one driver and one receiver on the A/B twisted pair, with separate active-high driver-enable (DE) and active-low receiver-enable (/RE) so a node can transmit, receive, or release the bus. It supports up to 32 unit loads on a segment, survives bus contention, and carries data over long cable runs where single-ended signalling fails. Tie DE and /RE together for half-duplex control from one pin. Runs from a single 5 V supply.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | R | output | Receiver logic data output. Presents the demodulated single-ended logic level from the differential RS-485 bus (A minus B). High-impedance (tri-state) when RE is deasserted (logic high). VOH ≥ 2.7 V at IOH = -400 µA; VOL ≤ 0.45 V at IOL = 8 mA. |+| 2 | RE | input | Receiver enable, active low. Drive low (VIL ≤ 0.8 V) to enable the receiver output R; drive high (VIH ≥ 2 V) to force R into the high-impedance state. Typically tied to DE (or its inverse) to form a direction-control pin. |+| 3 | DE | input | Driver enable, active high. Drive high (VIH ≥ 2 V) to enable the differential driver onto A/B; drive low (VIL ≤ 0.8 V) to place the driver outputs in the high-impedance state so the bus can be shared by other transceivers. |+| 4 | D | input | Driver logic data input. Single-ended TTL/CMOS-compatible logic level that is transmitted differentially onto the A/B bus lines when DE is asserted high. VIH ≥ 2 V, VIL ≤ 0.8 V. |+| 5 | GND | power_in | Device ground reference. Connect to the system ground plane. All logic-level voltages and the -1 V to +3 V common-mode window on A/B are referenced to this pin. |+| 6 | A | bidirectional | Non-inverting differential bus I/O for RS-422 / RS-485. Driven by the internal driver when DE is high, and monitored by the receiver relative to B. Wide input/output common-mode range and clamp diodes protect against bus faults; short-circuit current is internally limited. |+| 7 | B | bidirectional | Inverting differential bus I/O for RS-422 / RS-485. Driven complementary to A when DE is high; forms the negative side of the differential pair sensed by the receiver. Tolerates -10 V to +15 V at the bus terminal (absolute max). |+| 8 | VCC | power_in | Positive supply input, 5 V nominal (4.75 V to 5.25 V recommended, 7 V absolute max). Bypass with a 0.1 µF ceramic capacitor to GND close to the pin. ICC ≈ 42 mA typ (outputs enabled), 26 mA typ (outputs disabled). |++## Key specifications++| Parameter | Value |+|---|---|+| Type | RS-485/RS-422 transceiver |+| Channels | 1 driver + 1 receiver |+| Bus | differential A/B, up to 32 nodes |+| Enables | DE (driver) + /RE (receiver) |+| Data rate | up to 10 Mbps |+| Fail-safe | contention-protected outputs |+| Supply voltage | 5 V |+| Package | SOIC-8 |++## Ordering variants++- `SN75176BD (SOIC-8)`+- `SN75176BP (PDIP-8)`++## CAD (KiCad official)++- Symbol: `Interface_UART:SN75176AD (pin-compatible with SN75176B)`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn75176b.pdf) (30 pp, sha256 `6967824b2ea2d976`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/sn75176b-datasheet.pdf)

@@ -0,0 +1,36 @@+{+  "slug": "sn75176b",+  "version": "0.1.0",+  "type": "component",+  "description": "TI differential bus transceiver, SOIC-8. RS-485/RS-422, up to 32 nodes, driver + receiver with enables. Datasheet-verified.",+  "tags": [+    "component",+    "interface",+    "rs-485",+    "rs-422",+    "transceiver",+    "soic-8",+    "texas-instruments"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "sn75176b.kicad_sym",+    "sn75176b.kicad_mod",+    "sn75176b.glb",+    "docs/hero.png",+    "docs/sn75176b-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file